Make fails when configuring autoconf with a prefix containing a space

[tisser_n]

Make fails when autoconf is configured with a prefix containing a space :

address@hidden:~/autoconf-2.57 ./configure --prefix='/tmp/foo bar'

[...]

address@hidden:~/autoconf-2.57 make

[...]

Making all in m4sugar
make[2]: Entering directory
`/home/lrde/stud/tisser_n/autoconf-2.57/lib/m4sugar'
../../tests/autom4te                            \
        --language=m4sugar                      \
        --freeze                        \
        --output=m4sugar.m4f
autom4te: no such file or directory: bar/share/autoconf
make[2]: *** [m4sugar.m4f] Error 1
make[2]: Leaving directory
`/home/lrde/stud/tisser_n/autoconf-2.57/lib/m4sugar'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/lrde/stud/tisser_n/autoconf-2.57/lib'
make: *** [all-recursive] Error 1

This has been reproduced on the following systems :
Debian GNU-Linux unstable
Mac OS 10.2.3

--
Nicolas Tisserand